Speaker having a device capable of generating sound and vibration

Abstract

Disclosed is a speaker having a device capable of generating sound and vibration for notifying reception of an incoming call when a radio incoming signal is received. The speaker comprises a cylindrical frame; magnetic field forming means disposed in the cylindrical frame for forming first and second magnetic flux; a sound generating section for producing electromagnetic force by interaction with the first magnetic flux and thereby generating sound, when a signal having a frequency which is no less than a predetermined frequency, is applied thereto; and vibration generating means for producing electromagnetic force by interaction with the second magnetic flux and thereby generating vibration, when a signal having a frequency which is less than the predetermined frequency, is applied thereto.

What is claimed is:  
     
       1. A speaker having a device capable of generating sound and vibration for notifying reception of an incoming call when a radio incoming signal is received, the speaker comprising: 
       a cylindrical frame;  
       a magnetic field forming means disposed in the cylindrical frame for forming first and second magnetic flux;  
       wherein the magnetic field forming means includes an annular plate, an annular magnet and a yoke, the yoke having an annular flange portion, a cylindrical side wall portion extending upward from a circumferential inner surface of the annular flange portion and a top disc portion which closes an upper end of the cylindrical side wall portion, wherein the annular magnet and the annular plate are sequentially stacked on the annular flange portion of the yoke in a manner such that the cylindrical side wall portion and the top disc portion of the yoke are inserted into openings which are defined at center portions of the annular magnet and plate and a gap is defined between circumferential inner surfaces of the annular magnet and plate and a circumferential outer surface of the cylindrical side wall portion of the yoke, and the first magnetic flux is formed in the gap and the second magnetic flux is formed outside the annular magnet and plate,  
       a sound generating section for producing electromagnetic force by interaction with the first magnetic flux and thereby generating sound, when a signal having a frequency which is no less than a predetermined frequency, is applied thereto, wherein the sound generating section includes a vibrating plate and a voice coil, wherein the voice coil is integrally coupled to a lower end of the vibrating plate and is located in the gap, and, when the signal having the frequency which is no less than the predetermined frequency, is applied to the voice coil, the voice coil interacts with the first magnetic flux, and thereby vibrates the vibrating plate and generates sound; and  
       a vibration generating means for producing electromagnetic force by interaction with the second magnetic flux and thereby generating vibration, when a signal having a frequency which is less than the predetermined frequency, is applied thereto, wherein the vibration generating means includes a vibrating coil which is located between a circumferential inner surface of the cylindrical frame and the annular magnet, and a leaf spring which is coupled at one end thereof to a lower surface of the annular flange portion of the yoke to elastically support the yoke and is secured at the other end thereof to the cylindrical frame, wherein the vibrating coil is fixedly supported by the cylindrical frame, and, when the signal having the frequency which is less than the predetermined frequency, is applied to the vibrating coil, the vibration coil interacts with the second magnetic flux and thereby vibrates the magnetic field forming means.  
     
     
       2. The speaker as claimed in  claim 1 , wherein the vibrating coil is connected in parallel with the voice coil. 
     
     
       3. The speaker as claimed in  claim 1 , wherein the vibrating coil is connected in series with the voice coil.